# Who was "John Dalton"?

$\text{John Dalton (1766-1844)}$ was an English natural philosopher.....
......who developed an early atomic theory. See the wiki article. Some of the principles Dalton discovered, e.g. $\text{law of multiple proportions}$, $\text{law of partial pressures}$ are still taught at modern secondary schools. This is a true testament to the influence of his ideas.